Electric heater.



G. W. CARPENTER, J. RASMUSSEN L F. B. MUCRUSKY.

ELECTRIC HEATER.

APPLxcATIoN FILED APB. 16.1903.

91 6,994. Patented Apr. e, 1909 UNITED STATES PATENT OFFICE.

GEORGE W. CARPENTER, JOHN RASMUSSEN, AND FREDERICK B. MCGROSKYLPOF ONTARIO,

CALIFORNIA.

ELECTRIC HEATER.

Specification of Letters Patent.

.Patentamt apra o, 1000.

Appncun mea apra 1s, 190s. semi No. 42ans.

To all whom 'it 'may concern.'

lle it known that we, GEORGE W. CARPEN- TER, JOHN RAsMUssEN, and FREDERICK B. MoOnosKY, citizens of the United States of America, and residents of Ontario, in the county of San Bernardino and State of Cali` sad iron it is to be understood that the appli- 'cationfis not tobe so restricted but'that. its usefulnesqextends to stoves or heat'rsfci' any or all kinds in which the `source. of heat is electrictyaugmented by cores shaped and e invention has for its objects among havingthe cores so shaped and dis Vosed as l to give the' greatest posslblecont'act @tween Athe resistance wire and the `bottoni plate,

'vingperfect cpntacjI which is maintained,

y'pressureoha` lid upon an ash/estos onanal- -ogois plate or layer uponV the /top of the ctore' By our construction the heat is conined nearer the bottom `of the 'under plate where it is manifestly required. The. construction is such that` the expansionlof the cores Vcaused by the heating of the v'vlres in creases the contact of the Wire and the, surface of the walls of the grooves in which the same is placed; at the same finie-longitudinal movement-ofthe' cores caused by expansion is unrestricted. When a plied to 4a sad iron, particularly one'that is uble-ended, three cores are employed which are so.' disposed as to distribute the heat more evenly over the under surface of the iron and Vnearer the Points t w`und Vcoarser thereby'obviating thehither-A to common trouble of the current jumping across intervening spaces and; 'causing :the wire to burn out; At the end of theco Vea we em loy metallic clips from ythe former tliej bo ypf suoli iron. Weintroduce. the'elec-v tric `current intothe willeon the c'oresby means-of anotdinary orcelain socket l firmly attached to the thcirn. plug is of standard s ige 'and We are thus e :l abled to` attach onriron or heater -to any' lam cord by simplyuremoving the lamp` from thesocke't and screwing the lamp plad substantially as hereinafter "set forth. -p 20 also lpermitting*the usel of larger Wir-a,

socket on said orcelain plu B thi means We are enaliled to controth cato the iron by means of the switch in the socket without disconnecting the cord or removing any ylug.

Ot er' ob'ects and, advantages ofV the vention will hereinafter a pear@ atleftie* novel features thereolwillll) Y e particularly; pointed out in the aplpended olall 3 i *i i y The invention is c early` illustrated the" t accompanying drawings' Wlichfvitbthe 11u-gl 'merels of reference marked thereon' `forgo a part of this specification, and-iii-Whi Fi ure 1 1s a top lan of ourirnp'roved i doub e-ended iron with the lid removed, 7'0 Fig. 2 is a lon itudinal vertical sectionon tile* 1in-e 2 2' of 1 1. Fig. s is a vm'slcrs section on the in e 3 3 of Fig. Flglfis'fa erspective view of the' body;` portion of the, iron showing'its grooves.- ig. 5 is a per- ,7n sPective view of one ofthe clips 'emoved. f l" Like numerals of reference indicate like i, 'parts throughout the several'tviews. s' je v Referring to the drawings 1 designates body of t e iron having thesurrouii "Harige 2 at its lower portion and; upon` its Vupper face formedwit parallel depressing@ orgrooves3 and' 4, as seen'fbest These grooves or de ressions are mac f in the top surface o `the body ortionanv as are substantially semicircular in orxn so as 'tof give perfect contact with 'tho cores which` en's the body portion is formedy 4Wit screw-threaded openings 5 for the reception 9117V` of ,thescrews winch retain the lid in' place; In these grooves orfdepressions are designed.; to be received'th'e -cores. The' latter credesigned "'tomake perfect contact' in these grooves' or, de fassions and each core coxn-1 95 prisesa metallic body 6 4ofkbrass or other; ,y suitable material arounlwllch lswolind the j, wire 7.4 Each of these cores is substantgllyigT D-shaped or semicircular in crosssection seen best in Fig. 3, being arranged withr Igloflat faces uppermost,d so as to gir'fe greatest possible rcontact between the resls'iiannewgr'e, and the bottom plate Without restrict; necessary movement of the cores due totl .i expansion andcontraction.'A U on refer- 105 ence tolfig. ltawill be noted that t e central '.core extends from end to end of the body ortion of the' iron so as to distribute the t eat to the points lthereof, theother cor" j being disposed `upon opposite sides of Ii:

central cone. These cores are properly oonnected up, us seen, by the wires H, l), l() und j 11 111 Fur. l, the tern'nnals l2 and lll bonu; deslgned to be connected with the porcelain socket plugr 14 of. uell liuown construction, the connectlon being runde 1n the usual any, 15 are sheet metal ehps conforming to the sha e of the ontside, ,rf the scrnrirr-,ularl Suitable insulation 17 and VI8 is "j groovrs und having' llnl handle 20 secured thereto by suitable means as the screws 21. This lid carries the socket )lug 14 just referred to which is designed lor the attachment o' the ordinaryI lamp socket with its switch so that the current may be readily applied and controlled.

. Suitable insulation 22 is disposed between the bottom face of the iange 23 of the lid and theflange 2 of the bod portion, as seen best in Fig. 3, while suitab e material, as for instance asbestos 24, is placed over the cores, and'extends downwardly, as seen at 25, so as to thoroughly insulate the arts. Upon the upper surface of this insu ation 24 is a plate 26 helddown bly. pressure through the :medium of the screws 27,., as seen best in Fig.3. This ressure is applied to theuppcr Hat surfaces o the cores so as to foreethcir lower rounded surfaces, which latter and. their cooperating grooves may be of any `vshape having a curved or rounded form u on their under surfaces, into close Contact wlth the Walls of the grooves, 'or depressmnsji This shape of groove and core gives `the greatest possible contact between tl1c\re` sistance wire and the bottoni plate through the inner walls of? the grooves in the latter.

4Modiicetions in details may be resorted,l

to' without departing from the spirit of the invention or sacrificing any of its advanta es.`

at is claimed as new is 1. In an electric heater, a body portion having rounded ooves in its upper fare, and cores dispose in said grooves, said cores having flat upper faces and rounded under surfaces conforming to the shape of the grooves.

2. 'In an electric heater, a body portion having rounded grooves in its upper face,

cores disposed in' said grooves, said cores having flat u per faces and rounded under Surfer-.es con orming to the shape of the grooves, and insulation compressed against the u per flat faces of said cores.

3. n an electric heater, a body portion havingr rounded `grooves, cores itting said inoiul #lips roulorniing to the under faces nl' llie bodies olr the corr-.s to lorrn rlosc contart bruni-cn the sunnnnd ilul body ol the healer.

l. ln nuclei-11i(-y heater, :i bodv portion huvinnV rounded grooves, coros litting said upper luces exlondrd :ibovo llro upper lnrc olA sind body portion, nletnl clips indopmulnnl ol' and conl'olnnnp' to iluI lnnlmlures ol ilu` bodies of the rorrs lo torni (los-'s ifonlnet between the sinne und the body olA the healer. insulation bearing on the upper turcs of the cores, and nouns l'or applying pressure to said insulalion.

.3. ln n.11 electric heater, a body portion having; longitudinal grooves, cores seated in snid grooves with llnt upper faces extended above the top l'nrc ol' seid body portion, a lid connected to seid body, insulation bearing directly upon the winding.;r ol said cores, a pressure pluie upon said insulation and a socket plug mounted upon said lid and conmiwled with the terminals of said cores.

(i. .in un electric heater, a body portion having rounded longitudinal grooves,cores seated in seid grooves and having flat .upper faces extended nbove the top of said body portion, u. lid connected to said body, asocket plug;- mourned upon said lid and connected with the terminals of said cores, and metal flips independent of and conforming to the under suri'zn'es ol` the cores and forming a r-lose metallic connection between the body portions oll the cores and the body of they non.

7. lu an electric heater, a double-.ended body portionhaving a rontratgroovein its upper l'ncecxlcndwl to the ends thereof. and grooves upon opposite sides of said, ,central grou ve, sind" "groovcs being subntal'ktialiy semieirenlnr in cross section, cores in said `njroores having' lint upper faces and rounded under surfaces, insulation upon the l'lat faces el' ihr cores, ineens for applying pressure to said insulation, and a lid.

8. ln an electric heater, a double-ended body portion having a central groove in its upper l'ace extended to the ends thereof and grooves up'on opposite sides `ofsaid central `groove, said lgrooves beingr substantially semieireiilnr in ross section, core/B' said grooves luis/ling* flatf upper facesfandfmounded under surfaces, insulation u on the at faces of the cores, 'means for a p ying pressure to said insulation, a lid, an a socket plu on said lid connected with the terminals o the wind ol said cores.

9. ln un electric heater, a double-ended body portieri having a central groove in its upper farce extended to the ends thereof `and groovesu'pon opposite sidesiot said central g1oovc,`,said grooves being substantially semicircular in cross section, ooresin 'said grooves having; flat upper faces and rounded grooves and having llni upper faces, and under surfaces, insulation upon the flat faces 1:

said insulation, a lid, a socket plug on said lid connected with the terminals of the Wind of said cores, and metallic clips conforming to the shape of the undersurfaces of the bodies of said cores und forming a close metallic connection between the same and the body of the iron. v

10. In an electric heater, a body portion having a, surrounding ienge at its base and upon. its upper face formed with parallel rounded grooves, the one et the center there of extending substantially` from point to of the ycores, lne-fins for applying pressure to l point, the portions of said body at the ends of the grooves being formed with openings, and the whole adapted to serve in connection with removable cores and a lid and compression devices.

Si ned by us at Ontario- Californie this 8th ay of Aprl,`1908.- i v GEORGE W. CARPENTER. JOHN vRASMUSSEN. FREDERICK B. MCCROSKY. Witnesses: f

J. M. PACKARD, C. G. COOKINGHAM. 

